I have noticed that if im just coasting out of gear that my rpm's bounce slightly between 1400 to 1500 rpms. Is that normal? it's enough to where you can hear it revving up and down it does this cold or warm and revs up for about 3 seconds befor coming back down and then continues the process. If im at a dead stop its fine only when moving out of gear. I cleaned i.a.c, t.b, has all new plugs and wires and new injectors.